Home
Class 12
BIOLOGY
While analyzing the DNA of an organism, ...

While analyzing the DNA of an organism, a total number of 5386 nucleotides were found out, of which the proportion of different bases were : Adenine = 29 % , Guanine = 17 % , Cytosine = 32 % , Thymine = 17 %. Considering the Chargaff's rule it can be concluded that :

A

it is a double-stranded circular DNA.

B

it is single-stranded DNA.

C

it is a double-stranded linear DNA.

D

no conclusion can be drawn.

Text Solution

Verified by Experts

The correct Answer is:
B
According to Chargaff.s rules of base pairing, (i) The amount of adenine is always equal to the amount of thymine and the amount of guanine is always equal to the amount of cytosine. (ii) Adenine is joined to thymine with two hydrogen bonds and gua nine is joined to cytosine by three hydrogen bonds. (iii) The ratio of adenine to thymine and that of guanine to cytosine is always equal to one, that is., AG: TC = 1. In the given or ganism, the DNA is not following the Char gaff.s rule, hence it can be concluded that it is a single-stranded DNA, not double-stranded.
Promotional Banner

Similar Questions

Explore conceptually related problems

While analysing the DNA of an organism a total number of 5386 nucleotides were found out of which the proportion of different bases were : Adenine = 29 % , Guanine = 17 % , Cytosine = 32 % , Thymine = 17 % Considering the Chargaffs rule it can be concluded that :

Total number of nucleotide sequences of DNA that codes for a hormone is 1530. The proportion of different bases in the sequence is found to be Adenine = 34%, Guanine = 19%, Cytosine = 23%, Thymine = 19%. Applying Chargaff’s rule, what conclusion can be drawn?

While analyzing the DNA of an organism, it was found that adenine proportion was 30% what. Would be the proportion of cytosine in its DNA ?

While analysing the DNA of an organism, different proportions of bases were obtained as given below Adenine = 28% Guanine = 22% Thymine = 28% Cytosine = 22% . From the above informations it can be generalised that

In DNA of certain organisms, guanine constitutes 20% of the bases. What percentage of the bases would be adenine

In 3.2 Kbp long piece of DNA, 820 adenine bases were found. What would be the number of cytosine bases ?

" A DNA has "5000" base pair,if the amount of adenine is "10%" then find out the total number of nucleotides of cytosine Present."

A DNA has "5000" base pair if the amount of adenine is 10% then find out the total number of nucleotides of cytosine Present

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?